var createError = require('http-errors');
var express = require('express');
var path = require('path');
var cookieParser = require('cookie-parser');
var logger = require('morgan');

// 引入代理服务器
const { createProxyMiddleware } = require('http-proxy-middleware');
//配置代理服务器
const options = {
  target:'http://localhost:3000', // target host
  changeOrigin: true, // needed for virtual hosted sites
  pathRewrite: {
    '^/api/': '/'
  }
};
var app = express();

app.use(express.static(path.join(__dirname, 'public')));

var proxy = createProxyMiddleware(options);
app.use("/api",proxy);

// catch 404 and forward to error handler
app.use(function(req, res, next) {
  next(createError(404));
});

// error handler
app.use(function(err, req, res, next) {
  // set locals, only providing error in development
  res.locals.message = err.message;
  res.locals.error = req.app.get('env') === 'development' ? err : {};

  // render the error page
  res.status(err.status || 500);
  res.render('error');
});

module.exports = app;
